Juice and milk is available at no charge during meal times in the buffet or the main dining room (room service too). Bars don't serve milk. The fountain fun card used to include juice (my son could get his favorite fruit punch at bars, which was a mix of orange, pineapple, and sour mix), but I think Carnival has stopped that and it is only soda now. BTW, you cannot use the card to get sodas from room service but it does work in the dining room.